Making A Table That Stores Banned People?

I got my own anti-cheat in a project of mine and I utilize DSS as well. I use two seperate scripts to achieve this, but you could most likely use one.

--DataStorage Script
local DSS = game:GetService("DataStoreService")
local MDS = DSS:GetDataStore("MDS")

game.Players.PlayerAdded:Connect(function(plr)
	local data = Instance.new("Folder")
	data.Name = "PlayerData"
	data.Parent = plr
	
	local banned = Instance.new("BoolValue")
	banned.Name = "isBanned"
	banned.Parent = data
	
	local money = Instance.new("IntValue")
	money.Name = "Cash Money"
	money.Parent = data
	
	local Banneddata
	local Moneydata
	
	local success, errormsg = pcall(function()
		Banneddata = MDS:GetAsync(plr.UserId.. "-isBanned")
		Moneydata = MDS:GetAsync(plr.UserId.. "-Money")
	end)

	if success then
		banned.Value = Banneddata
		money.Value = Moneydata
		if banned.Value == true then
			plr:Kick("You're not welcome here.")
		end
	else
		print("There was an error while recovering ".. plr.Name.. "'s data...")
		warn(errormsg)
	end
end)

game.Players.PlayerRemoving:Connect(function(plr)
	
	local success, errormsg = pcall(function()
		MDS:SetAsync(plr.UserId.."-isBanned", plr.PlayerData.isBanned.Value)
		MDS:SetAsync(plr.UserId.. "-Money", plr.PlayerData["Cash Money"].Value)
	end)
	
	if success then
		print(plr.Name.. "'s data was saved.")
	else
		print(plr.Name.. "'s data was not saved due to an error.")
		warn(errormsg)
	end

end)

--Second script.
local Banned = {}
local Favorites = {1348670747,}
game.Players.PlayerAdded:Connect(function(plr)
	local PlayerData = plr:WaitForChild("PlayerData")
	for i, b in ipairs(Banned) do
		if b == plr.UserId then
			plr:Kick("You're not welcome here.")
			print(plr.Name.. " was kicked.")
		end
	end
	for i, b in ipairs(Favorites) do
		if b == plr.UserId then
			print(plr.Name.. ".")
		end
	end
	if plr.PlayerData.isBanned.Value == true then
		plr:Kick("You're not welcome here.")
	end
end)
--[[
	Temporary Ban List
	-
--]]

So how does it work? Whenever a play joins the game, a folder called "PlayerData" is inserted into the instance, where it keeps track of their banned state, and money in my case. If my anti-cheat catches a player, it ticks off their 'banned' bool as true, then kicking them. If they dare to rejoin, it checks if they're banned and if so, it kicks them. In your case, you can make it so that when you hit the player with your ban hammer, it gets the player from the character, turns the banned bool to true, and kick them. Edit: Remember that I used DataStoreService, but you could probably use DS2.